Seismic Response of Transamerica Building. I: Data and Preliminary Analysis

Çelebi, Mehmet; Şafak, Erdal

doi:10.1061/(asce)0733-9445(1991)117:8(2389)

Cited by 43 publications

(20 citation statements)

References 6 publications

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“…The expected range of acceleration values for ambient vibration tests is 10 -7 to 10 -4 g. Therefore, there is no doubt that the low level of the shaking only gives relevant information on the elastic behaviour of the structure. Many authors [e.g., 17,18,19,20,23,24,25,26] showed that non-linearity affects resonance frequencies when the level of loading increases. This non-linearity is due to the opening of micro-cracks in the concrete during vibrations, which may decrease temporarily, or permanently the stiffness, and then the resonance frequencies, of the structure.…”

Section: Modal Parameters From Ambient Vibration Recordingsmentioning

confidence: 99%

Dynamic parameters of structures extracted from ambient vibration measurements: An aid for the seismic vulnerability assessment of existing buildings in moderate seismic hazard regions

Michel

Guéguen

Bard

2008

Soil Dynamics and Earthquake Engineering

132

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During the past two decades, the use of ambient vibrations for modal analysis of structures has increased as compared to the traditional techniques (forced vibrations). The Frequency Domain Decomposition method is nowadays widely used in modal analysis because of its accuracy and simplicity. In this paper, we first present the physical meaning of the FDD method to estimate the modal parameters. We discuss then the process used for the evaluation of the building stiffness deduced from the modal shapes. The models considered here are 1D lumped-mass beams and especially the shear beam. The analytical solution of the equations of motion makes it possible to simulate the motion due to a weak to moderate earthquake and then the inter-storey drift knowing only the modal parameters (modal model). This process is finally applied to a 9-storey reinforced concrete (RC) dwelling in Grenoble (France). We successfully compared the building motion for an artificial ground motion deduced from the model estimated using ambient vibrations and recorded in the building. The stiffness of each storey and the inter-storey drift were also calculated.

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Section: Modal Parameters From Ambient Vibration Recordingsmentioning

confidence: 99%

Dynamic parameters of structures extracted from ambient vibration measurements: An aid for the seismic vulnerability assessment of existing buildings in moderate seismic hazard regions

Michel

Guéguen

Bard

2008

Soil Dynamics and Earthquake Engineering

132

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“…Evaluation of SSI effects during strong motion events was extensively studied in Ç elebi and Şafak [9,10], Şafak [11], and Ç elebi [7]. In those studies, data from instrumented buildings was analysed using Fourier amplitude spectra which is a frequency domain technique.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Seismic Response Trends from Long-Term Monitoring of Two Instrumented RC Buildings Including Soil-Structure Interaction

Butt

Omenzetter

2012

Advances in Civil Engineering

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This paper presents analyses of the seismic responses of two reinforced concrete buildings monitored for a period of more than two years. One of the structures was a three-storey reinforced concrete (RC) frame building with a shear core, while the other was a three-storey RC frame building without a core. Both buildings are part of the same large complex but are seismically separated from the rest of it. Statistical analysis of the relationships between maximum free field accelerations and responses at different points on the buildings was conducted and demonstrated strong correlation between those. System identification studies using recorded accelerations were undertaken and revealed that natural frequencies and damping ratios of the building structures vary during different earthquake excitations. This variation was statistically examined and relationships between identified natural frequencies and damping ratios, and the peak response acceleration at the roof level were developed. A general trend of decreasing modal frequencies and increasing damping ratios was observed with increased level of shaking and response. Moreover, the influence of soil structure interaction (SSI) on the modal characteristics was evaluated. SSI effects decreased the modal frequencies and increased some of the damping ratios.

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“…In California, the California Strong Motion Instrumentation Program has installed ground response stations on about 160 buildings to provide information on ground motions and to improve the structural design based on the feedback of the structural health subject to these ground motions. 19 Çelebi and Safak 53 recorded a set of strong-motion-induced acceleration responses from a 60-storey building in San Francisco, during the Loma Prieta earthquake on October 17, 1989. The building was instrumented with synchronised accelerometers and strong-motion accelerographs deployed throughout the structure and connected to a central recording system.…”

Section: Vibration Analysis Techniquesmentioning

confidence: 99%

Review on field monitoring of high‐rise structures

Xia

Weng

2020

Struct Control Health Monit

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Structural health monitoring (SHM) has been developed and applied to bridge structures since the early 1980s. Numerous approaches and techniques have been proposed and applied to supertall structures during the recent decade. This paper reviews the SHM techniques and applications in supertall structures. The vibration analysis techniques, seismic effect monitoring, wind effect monitoring, comfort assessment, temperature effect monitoring, and construction monitoring of high-rise structures are described and summarised. The latest developments in codification and standardisation in SHM are also introduced.

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Seismic Response of Transamerica Building. I: Data and Preliminary Analysis

Cited by 43 publications

References 6 publications

Dynamic parameters of structures extracted from ambient vibration measurements: An aid for the seismic vulnerability assessment of existing buildings in moderate seismic hazard regions

Dynamic parameters of structures extracted from ambient vibration measurements: An aid for the seismic vulnerability assessment of existing buildings in moderate seismic hazard regions

Evaluation of Seismic Response Trends from Long-Term Monitoring of Two Instrumented RC Buildings Including Soil-Structure Interaction

Review on field monitoring of high‐rise structures

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